Liquid bag



A. RICHARDS May w, 1936.

LIQUID BAG Filed March 18, 1935 2 Sheets-Sheet 1 A. RICHARDS May E9, 1936.

LIQUID BAG Filed March 18, 1935 2 Sheets-Sheet 2 Patented May 19, 1936` UNITED STATES PATENT OFFICE LIQUID BAG Antonio Richards, Providence, R. I.

Application March 18', 1935, Serial No. 11,535 41 claim. (o1. 15o-2.7)

stantial distance thereof to prevent the bag from expanding and contracting, or otherwise bowing when filled with liquid in use, said wall being preferably integrally molded inthe shaping and manufacturing of the liquid bag. By employing this wall molded integrally with the bag, I am enabled to provide a center wall entirely constructed of the material of the side walls and entirely integral therewith ,-notV depending on its strength for the joining of rubber rodsy in a separate vulcanization which would tend to distort the bag after the bag has been initially formed.

This application is partly disclosed in my application Serial Number 720,523 filed April 14. 1934 Patent No. 2,003,092 for Liquid bag and method and apparatus for making same, andis a continuation in part` thereof, also showing and claiming an alternative specific embodiment of the broad invention shownY therein, ywherein the central, vertical, supportingwall comprises a plu-y rality of vertically aligned andvertically spaced walls, each seamlessly molded to the side wallsofthe bag, for the purpose of giving a greater strength to the bag, not only when used asa hot water bottle, but also when used as a douche bag or for other purposes, it being obvious that the new embodiment of my invention shown' herein, may berreadily made inthefsame type of apparatus shown in the parent application by merely modifying the shape of the two individual parts of the mold showntherein;

A11-object of my invention is, therefore, to make a'molded rubber bag provided with acentral walln seamless in every respect.

An object of my'inve'ntin, therefore, is to provide an integral wall, or n which will prevent the liquid bag from bowing when filled with liquid or otherwise getting out of shape, and permanently retaining it in use in the desired flat shape.

It is well known that when rubber surfaces touch each other when dry they tend to become stuck to each other and deteriorate. A further feature of my invention is to continually space the side walls of the liquid bag when not inv use by means of my improved molded integral wall.

A further object of my invention is to provide a bag which will accomplish the results named in the two preceding paragraphs without in any way affecting the external appearance or shape of the liquid bag.

These and such other objects of my invention as may hereinafter appear will be best understood from a description of the accompanying drawings, which illustrate my improved mold, its method of use and my improved liquid bag.

Fig. 1 is a side elevation of my improved molded bag.

Fig. 2 is a vertical sectional view thereof taken along the line 2-2 of Fig. 1.

Fig. 3 is a side elevation of an alternative embodiment of my invention applied to a douche bag in place of a hot water bottle shown in Fig. l, and in which the central vertical, supporting wall comprises a plurality of vertically aligned and vertically spaced walls, each seamlessly molded to the side walls of the bag or bottle and in which each individual wall is of a substantial relative width to extend a substantial distance on each side of the vertical central line of sai-d bag for added strength and of relatively little height to permit the ready circulation of water back and forth in the spaces between each wall.

Fig. 4 is a vertical, sectional'view of thev embodiment of my invention shown in Fig. 3, taken along the line 4 4 of Figure 3.

Fig. 5 is a partial side elevation of a portion of an alternative embodiment of my douche bag generally similar to the embodiment shown in Figure 3, with the exception that the plurality of vertically aligned and vertically spaced walls comprise relatively thin fins only slightly vertically spaced from each other. n

Fig. 6 is a partial vertical, sectional view' of the embodiment of my invention shown in Fig. 5, taken along the line Iii-6 of Figure 5.

In the drawings, wherein like characters of reference indicate like parts throughout, Ill generally indicates amolded liquid bag of flat-oblong shape having a body portion I2, a constricted neck I4, side walls I8 and end walls I'I and a central, vertical wall I6 integrally molded to the opposite adjacent side walls I8 of said bag in a seamless manner. As stated hitherto, this seamless molded Wall I6 prevents irregular bowing or shaping when filled with liquid in use and also spaces th-e side walls I8 when not in use to prevent any direct contact with each other and hence deterioration of the rubber surfaces thereof While I am aware that others have attempted to solve this general problem, so far as I am aware they have done so by inserting a plasticizable peg or rod in the bag usually after the initial molding and supplementally cementing or semivulcanizing it thereto in a manner to form a seam at each end thereof. By employing my improved core and mold shown in the parent application, and splitting the usual core into a main core and a. supplemental core in the manner shown herein, I believe I am able to provide for the first time a. liquid bag having a molded integral wall integrally spacing the side walls of the liquid bag.

While any suitable plasticizable material may be used for forming my improved bag, I preferably cover a suitable core, by wrapping rubber strips therearound or laying rubber layers on the top and bottom thereof, place it in a mold and subject it to a suiiiciently high temperature to plasticize the material to form the desired article. While any suitable type of plasticizable material may be used in accordance with the usual practice of making liquid bags, I preferably construct my improved bag out of rubber and for this purpose I preferably wind strips of unvulcanized rubber or layer sheets having the usually desired vulcanized materials incorporated therein around the core prior to inserting it in the mold.

As stated hitherto, if desired, other types of plasticizable material than rubber may be employed which may be either wrapped around the core as stated, or poured or laid into the concavities between the mold and core formed by their specific construction. As shown in said parent application, the two parts of the core are preferably constructed so as to leave slits in between them adapted when the entire article is subjected to suitable heat and pressure, to cause the rubber to flow in the walls in the core between the side walls of the bag to form, when completed, a central vertically extending supporting wall integrally seamlessly molded to the side walls of the bag. I have shown in Figs. 3-6, two alternative species of my invention applied to a fountain syringe type of bag provided with the usual opening I5 in the top thereof and the fitting 20 for attaching a hose at the lower end thereof. In both of these embodiments the central vertical supporting wall, integrally seamlessly molded to the side walls of the bag for a substantial distance each side of the center thereof, comprises a plurality of vertically aligned and vertically spaced walls I6 as shown in Figs. 3 and 4, and I6 as shown in Figs. 5 and 6. In the embodiment shown in Figs. 3 and 4 each of the vertically aligned and vertically spaced walls are of substantial, relative Width to extend a substantial distance on each side of the vertical central line of said bag for the purpose of giving added strength to said bag and of relatively little height to provide the circulation ducts I9 for the back and forth circulation of liquid in between each of the individual walls I6'. In the embodiment shown in Figs. 5 and 6, each of the vertically aligned and vertically spaced walls preferably comprises the thin ns I6" each of greater height than the walls I6 shown in the embodiment shown in Figures 3 and 4, of substantially less width, and vertically spaced from adjacent fins a substantially less distance I9. It is obvious that either of these embodiments may be readily made by merely changing the size, shape and number of slits in the core members of the molding apparatus shown in my parent application, such as by adding a plurality of projections on the inner side wall of the supplemental core member shown therein. The provision of the centrally arranged connecting walls I6' or IB", arranged in a column, gives a longitudinally concave effect to the bag when it is lled, because the liquid will bulge the bag a little to either side of the column, while the connecting webs forming the column prevent such bulging in the middle of the bag. This longitudinally concave effect is very desirable when the bag is used on a portion of the body that may be considered to be longitudinally convex, such for instance, as the leg of a patient.

It is thus apparent that I have provided a novel type of seamless liquid bag, for use as a *l water bag, fountain syringe bag or any of the other uses thereof provided with a seamless, integrally molded, vertically central wall I6 for the double function of keeping the bag in correct at position in use and preventing the liquidl therein from bowing it out of shape and spacing the side walls I8 thereof when not in use.

I employ the words vertically horizontally etc. as applied to the bag in a vertical position in use regardless of its position on the mold.

It is understood that my invention is not limited to the specific embodiments shown and that various deviations may be made therefrom without departing from the spirit and scope of the appended claim.

What I claim is:

A molded bag of ilat oblong shape for holding liquids, having a filling opening at the upper end thereof and flexible side walls, and having, when the bag is in a vertical position, a plurality of horizontally disposed walls, extending transversely of the bag for a substantial distance to either side of the center but terminating Well within the side edges of the bag, and spaced one above the other for providing liquid circulation spaces arrangement of said walls facilitating the bending of the bag about axes transverse thereof, said horizontally disposed walls, while exible, being of suicient rigidity to hold the walls spaced apart when the bag is empty.

ANTONIO RICHARDS. 

